Thanks for the props, Fert1. Maybe culantro isn't as delicate as its reputation.
I cut a soil section that contained three culantro plants, spaced less than 1/2 centimeter apart. I cut a small square in the soil, digging down about two inches. I pulled apart each plant similar to how I separate tomatoes, and re-planted them individually in a new pot. The results:
They're not too happy right now, but they are improving. Conclusion so far: Culantro's not so wimpy. These three were bare-rooted for a bit, and my fingers were all over them while I was separating.
Here's an update on how the other culantros are doing, 17 May:
Maybe I'll have enough to add to a soup in ... oh, three or four more MONTHS?
J